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<head>
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 继承的权重为0 */
        .daohanglan {
            color: red;
        }

        li {
            color: green;
        }
    </style>
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<body>
    <nav class="daohanglan">
        <ul>
            <li>继承的权重为0</li>
        </ul>
    </nav>
</body>

</html>